Changes

[diagram] Fix a bug that prevented correct rendering of projection bars when using GLSPProjectionView #298
[a11y] Improved responsibility and feedback when resizing or moving diagram elements with keyboard-only commands #295
[diagram] Extends configureDiagramOptions function to also allow partial configuration of ViewerOptions #296
[diagram] Remove unused handleSetContextActions from ToolPalette #301
[diagram] Deprecate ISModelRootListener API in favor of IGModelRootListener #303
[diagram] Ensure that the suggestion container position of the AutoCompleteWidget is rendered correctly #304
[feature] Extend ToolPalette/CreateOperation API to support rendering of preview/ghost elements when creating new nodes #301
[protocol] Fix a bug in BaseJsonRpcClient to ensure that it can handle multiple open diagram sessions #307
[diagram] Restructure some tools to have a more common infrastructure and support helper lines #306
[diagram] Fix a bug in SelectionService that caused issues with inversify when injecting certain services (e.g. ActionDispatcher) in SelectionChangeListener implementations #305
[diagram] Ensure that the SelectionService does not trigger a change event if the selection did not change on model update #313

Full Changelog: v1.0.0...v2.1.0

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